GB2018999A - Distance Measuring - Google Patents

Distance Measuring

Info

Publication number
GB2018999A
GB2018999A GB7845883A GB7845883A GB2018999A GB 2018999 A GB2018999 A GB 2018999A GB 7845883 A GB7845883 A GB 7845883A GB 7845883 A GB7845883 A GB 7845883A GB 2018999 A GB2018999 A GB 2018999A
Authority
GB
United Kingdom
Prior art keywords
transducer
displacements
piston
relatively
bore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7845883A
Other versions
GB2018999B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cardiff University
Original Assignee
Cardiff University College
Cardiff University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cardiff University College, Cardiff University filed Critical Cardiff University College
Priority to GB7845883A priority Critical patent/GB2018999B/en
Publication of GB2018999A publication Critical patent/GB2018999A/en
Application granted granted Critical
Publication of GB2018999B publication Critical patent/GB2018999B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/225—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the mutual induction between the two coils
    • G01D5/2258—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the mutual induction between the two coils by a movable ferromagnetic element, e.g. core
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

A transducer arrangement is provided for measuring distances representing relative displacements between apparatus parts, particularly pistons and cylinders of hydraulic rams. A plug 30 may screw fit into a hydraulic ram cylinder end and houses an electromagnetic distance transducer 58 having a short range of operation with opposing applied biases from relatively strong and weak springs 40 and 52, respectively, between it and a part 54 which may be pinned to the interior of an axial bore through a piston and its rod assembly. The relatively weak spring 52 is constrained in a tubular sleeve 22 also to extend within a piston/piston rod bore. In operation, relatively large displacements of an apparatus part keyed to the part 54 will produce nearly proportionate smaller displacements of a transducer core 56 enabling the transducer 58 effectively to measure such large displacements accurately. <IMAGE>
GB7845883A 1978-04-11 1978-11-23 Distance measuring Expired GB2018999B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7845883A GB2018999B (en) 1978-04-11 1978-11-23 Distance measuring

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1407278 1978-04-11
GB7845883A GB2018999B (en) 1978-04-11 1978-11-23 Distance measuring

Publications (2)

Publication Number Publication Date
GB2018999A true GB2018999A (en) 1979-10-24
GB2018999B GB2018999B (en) 1983-01-19

Family

ID=26250262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7845883A Expired GB2018999B (en) 1978-04-11 1978-11-23 Distance measuring

Country Status (1)

Country Link
GB (1) GB2018999B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499711A1 (en) * 1981-02-09 1982-08-13 Siderurgie Fse Inst Rech Metal sheet thickness measurer for rolling mill - has jack including piston with contact element whose movement under pressurised fluid is detected by displacement sensor
US4490913A (en) * 1983-01-24 1985-01-01 Vis Arthur D Low contact force position sensing probe
FR2646505A1 (en) * 1989-04-29 1990-11-02 Teves Gmbh Alfred RACE SENSOR, IN PARTICULAR FOR THE PEDAL OF A BRAKING SYSTEM
GB2288240A (en) * 1994-03-08 1995-10-11 Volkswagen Ag Device for detecting the position of a control element
CN105424498A (en) * 2015-12-21 2016-03-23 郑州大学 Concrete material in-high-temperature compression testing machine and in-high-temperature compression testing method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102900728B (en) * 2012-09-29 2015-02-25 中国重型机械研究院股份公司 External displacement sensor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499711A1 (en) * 1981-02-09 1982-08-13 Siderurgie Fse Inst Rech Metal sheet thickness measurer for rolling mill - has jack including piston with contact element whose movement under pressurised fluid is detected by displacement sensor
US4490913A (en) * 1983-01-24 1985-01-01 Vis Arthur D Low contact force position sensing probe
FR2646505A1 (en) * 1989-04-29 1990-11-02 Teves Gmbh Alfred RACE SENSOR, IN PARTICULAR FOR THE PEDAL OF A BRAKING SYSTEM
GB2232770A (en) * 1989-04-29 1990-12-19 Teves Gmbh Alfred Travel sensor for measuring mechanical quantities of motion
GB2232770B (en) * 1989-04-29 1993-12-01 Teves Gmbh Alfred Sensor for use in measuring relative distance travel between mechanical
GB2288240A (en) * 1994-03-08 1995-10-11 Volkswagen Ag Device for detecting the position of a control element
GB2288240B (en) * 1994-03-08 1998-09-30 Volkswagen Ag Device for detecting the position of a control element
CN105424498A (en) * 2015-12-21 2016-03-23 郑州大学 Concrete material in-high-temperature compression testing machine and in-high-temperature compression testing method

Also Published As

Publication number Publication date
GB2018999B (en) 1983-01-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee